Features: The SG3525 LM358 Inverter Driver Board features adjustable frequency (50Hz-500kHz), double channel amplification, and overcurrent/short circuits protections for precise power control in DIY electronics and audios systems. Integrated SG3525 PWM controller ensures stable frequency output while LM358 operational amplifiers enhances signal claritys with low noise performances across 8-12V input ranges. Design for electronics hobbyists, audios engineers, and maker seek customizable solution for portable speakers, automotive systems, or laboratory testing equipment. Optimized for audios amplification projects, small scale power conversions, and experimental setups requiring adjustable frequency control with smooth waveform output. compactly design with standardized interfaces simplifies installation in DIY , while builts in safeguards protect connecting devices during voltages fluctuations or circuit anomalies. Specifications: Component:Plastic Size:Approx.3.4x2.8cm/1.34x1.1in Rate voltages: 8V-12V Rate current: 1 A Option Type:1pc,3pcs; Package Includes: Package A 1pc SG3525 LM358 Inverter Driver Board Package B 3pc SG3525 LM358 Inverter Driver Board note: Please allow 1-10mm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual item color.